feat: comprehensive CMS improvements

- Fix DOMPurify SSR crash (use isomorphic-dompurify)
- Fix SanitizedHtml to sanitize by default
- Add auth guards to studio/catalog maintenance pages
- Add update/edit to vouchers CRUD
- Add update/edit to rare-values CRUD
- Add approve workflow to applications page
- Add edit form to guilds detail page
- Add SEO metadata to all public pages (21 pages)
- Fix mobile nav accessibility (focus trap, aria attributes)
- Fix missing labels and table accessibility
- Add dynamic imports for heavy client components (6 components)
- Fix silent error swallowing (40+ locations)
- Add content scheduling for articles (publishAt, status)
- Wire up 12 missing webhook notification triggers
- Add global search to admin panel
- Add bulk actions to admin users table
- Fix JSON formatting and a11y issues

src/actions/admin-guilds.ts

@@ -2,7 +2,10 @@
 
 import { eq, inArray } from "drizzle-orm";
 import { revalidatePath } from "next/cache";
-import { requirePermissionRateLimited } from "@/lib/admin/guard";
+import {
+	requirePermission,
+	requirePermissionRateLimited,
+} from "@/lib/admin/guard";
 import {
 	db,
 	GuildForumViews,
@@ -63,3 +66,47 @@ export async function disbandGuild(formData: FormData): Promise<void> {
 	});
 	revalidatePath("/admin/guilds");
 }
+
+export async function updateGuild(formData: FormData): Promise<void> {
+	const staff = await requirePermission(PERMS.USERS_EDIT);
+	const id = Number(formData.get("id"));
+	if (!(id > 0)) return;
+
+	const name = String(formData.get("name") ?? "")
+		.trim()
+		.slice(0, 50);
+	const description = String(formData.get("description") ?? "")
+		.trim()
+		.slice(0, 250);
+	const state = Number(formData.get("state"));
+	const forum = String(formData.get("forum") ?? "0");
+	const readForum = String(formData.get("readForum") ?? "EVERYONE");
+	const postMessages = String(formData.get("postMessages") ?? "EVERYONE");
+	const postThreads = String(formData.get("postThreads") ?? "EVERYONE");
+	const modForum = String(formData.get("modForum") ?? "ADMINS");
+
+	await db
+		.update(Guilds)
+		.set({
+			name,
+			description,
+			state,
+			forum,
+			readForum,
+			postMessages,
+			postThreads,
+			modForum,
+		})
+		.where(eq(Guilds.id, id));
+
+	await logStaffActivity({
+		staffId: staff.id,
+		action: "guild_update",
+		description: `Updated guild #${id}`,
+		targetType: "guild",
+		targetId: id,
+	});
+
+	revalidatePath("/admin/guilds");
+	revalidatePath(`/admin/guilds/${id}`);
+}